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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Coupled Electrochemical Processes for Removing Dye from Soil and Water

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Author(s):
Mendonca de Paiva, Suelya da Silva [1] ; da Silva, Iasmin Bezerra [1] ; Martins de Moura Santos, Elaine Cristina [2] ; Veras Rocha, Ingrid Medeiros [1] ; Martinez-Huitle, Carlos Alberto [2, 3] ; dos Santos, Elisama Vieira [1]
Total Authors: 6
Affiliation:
[1] Univ Fed Rio Grande do Norte, Sch Sci & Technol, BR-59078970 Natal, RN - Brazil
[2] Univ Fed Rio Grande do Norte, Inst Chem, BR-59078970 Natal, RN - Brazil
[3] UNESP, Natl Inst Alternat Technol Detect, Inst Chem, Toxicol Evaluat & Removal Micropollutants & Radio, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of the Electrochemical Society; v. 165, n. 9, p. E318-E324, 2018.
Web of Science Citations: 2
Abstract

In this work, a coupled remediation approach is studied by using electrochemical technologies (electrokinetic remediation (ER) and after that, BDD-electrolysis) to remove an azo dye from soil and after that, the elimination of dye from generated effluents was also attained. ER experiments were carried out using graphite electrodes, by applying 1 V cm(-1) for 14 d, investigating the use of solutions containing with 0.05 M of Na2SO4 and 0.05 M of sodium dodecyl sulfate (SDS) in the anodic and cathodic reservoirs, respectively. The results clearly indicated that SDS favors the elimination of organic pollutant from the soil, achieving 65%. However, the removal efficiency is increased (89%) when sodium sulfate solution was used as supporting electrolyte. The transport of organic compound in the soil from the cathode to anode reservoir was due to the electromigration phenomenon. Toxicity tests were performed to evaluate the reuse of the soil after remediation, then, the germination of sunflower seeds was carried out, achieving significant percentage of germination in central soil positions (65% and 92%). Finally, the effluent generated by ER was treated with BDD-electrolysis, obtaining complete discoloration after 80 min and a quasi-complete elimination of organic matter (more than 95%) after 120 min due to the contribution of persulfate (S2O82-) electrochemically generated at BDD anode. (C) 2018 The Electrochemical Society. (AU)

FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support type: Research Projects - Thematic Grants